245 IZA Discussion Papers
IZA Discussion Paper No. 1256
IZA Discussion Paper No. 1098
published in: Journal of Applied Econometrics, 2005, 20 (6), 771-795
IZA Discussion Paper No. 967
IZA Discussion Paper No. 61
published in: K.F. Zimmermann (ed.), European Migration - What Do We Know? Oxford University Press, 2005
IZA Discussion Paper No. 59
published in: : K.F. Zimmermann (ed.), European Migration - What Do We Know? Oxford University Press, 2005